4294, which is the last of its kind in the world, is a cab-forward design that protected its crew
from asphyxiation during runs thru the long tunnels and snow sheds on its route thru the Sierra
Nevada from Sacramento, California to Sparks, Nevada. The engine and tender are a staggering
123 ft, 8 inches long, weighing a million pounds with a full load of fuel, and no cars attached.
Additional info on the monster can be found at these links:
http://www.csrmf.org/events-exhibits/locomotive-favorites/southern-pacific-cab-forward-no-4294
http://en.wikipedia.org/wiki/Southern_Pacific_4294